Steam-hammer.



T. E. HOLMES. STEAM HAMMER.

APPLICATION FILED JUNE 24, 1908.

Patented July 27, 1909.

Mamas-:0 5

T. E. HOLMES. STEAM HAMMER. APPLICATION FILED JUNE 24 1908.

929,433, Patented July 27, 1909.

3 BHEETS'SHEET 2.

Q0 I -Mr.

T. E. HOLMES.

STEAM HAMMER. APPLIOATION FILED JUNE 24, 1908.

Patented July 27, 1909.

3 SHEETS-SHEET 3.

XVM

UNITED STATES- PATENT OFFICE.

THOMAS EDMUND HOLMES, or SHEFFIELD, ENGLAND, Assieuoaro DAVY BROTHERS LIMITED, OF'SHEFFIELDLENGL'AND, AN INCORPORATED COMPANY.

STEAM-HAWK.

Specification of Letters Patent.

Patented July 27, 1909.

Application filed June 24, 1908. Serial No. 40,119.

Steam and other Fluid-Pressure Hammers, of which the following is a specification.

' This invention relatesto steam and other fluid-pressure hammers of the combined handing and self-acting type, that. is to say wherein thereciprocations of the hammertup can, at will, be controlled either manually or automatically, or both manually and automatically at once, and the invention has for its'object to provide improved controlling gear whereby to rendera self-acting hammer more perfectly amenable than heretofore-to the will of the operator,so that the latter will be enabled to regulate, with greater certainty than has been possible,

hitherto, the frequency, intensity and lengthof stroke of individualbl'ows;

*F or the sake of simplicity inthe follow usually constructed, the reciprocations of the tup are transmitted (with the necessary reduction in amplitude, or reversal of direction, or-both) to the Working'valve, whereby steam is distributed to the opposite ends of the steam. cylinderrespectively, through the medium of What may be termed .a driving lever which is ivoted" to the tup and extends transverse y of the path thereof, this lever having a telescopic or equivalent connection with the points at which it is fulcrumed and at which it' is coupled to the spindle of the working valve respectively. The telescopic 'connectionin' question, according 'to a "wellknown method of construction, is constituted by a guide "sleeve through which'the driving lever slides longitudinally as the virtual length of the lever alters with the varying level of the ti The guide sleeve, which constitutes in effect portion of the driving lever, receives therefrom vibratory movement about a point forming a fulcrum in common for the lever and sleeve, the oscillations of the guide sleeve being transmitted to the Working valve whose spindle is coupled to the sleeve at a point-near said fulcrum. Thls'fulcrum tionary fulcrum, and the guide sleeve and handing'lever are coupled by separate links to the respective ends of a floating lever, whereof an intermediate point is pivotally attached to the spindle of the working valve. In consequence of this arrangement, the influence of the movementsof the hammer-tup upon the-working valve can with great ease be modified to any extent between the maximum and minimum, at will, by means of increased exibility of control secured by the invention resulting apparently from the fact that the pressure exerted by the driving lever is not transmitted so directly as heretofore to the handing lever, which is there fore more free from the disturbing influence of the movin hammer-tap and is consequently capable of being more easily and quickly controlled by thehand of the opera tor in accordance with momentary requirements,

In the case moreparticularly of hammers the handin lever; what maybe termed the;

which are liable to be called upon to act with more than the usual rapidity under manual.

control, provision may further be made for entirely eliminating, when desired, the influence of the'moving hamnier-tup' upon the workin valve, so that the latter Will then respond directly (as in an, ordinary manually controlled hammer) 'tothe movements im parted to thehanding lever by the operator.

For this purpose the fulcrum of the driving lever and -u1de sleeve is made capable ofbeingshifted at will from its usual position to one wherein it coincides with the pointof attachment (actual or virtual) between the 7 guide sleeve and 3 the link, whereby said sleeve is coupled to the floating lever already" mentioned, so that when the fulcrum'ls in thislatter positionthefvilorations of the driving" lever willcease to affect the Working valve in any way.

x In the accompanying drawings, Figurei is'an elevation, partly in section, of a steamhammer of the overhung Rigby type to which the present invention is applied, and

Fig. 2 is a broken horizontal section of the same through the fulcrun'is of the driving and handing levers respectively." Fig. 3 is an elevation of a steam hammer of the double standard or A-frame type, embodying a modification of the invention designed to enable the effect of the self-acting gear to be eliminated at will. Fig. 4 is a part side elevation of the guide sleeve ilIlCl ilSSOClillZGd parts, showing the said modified eonstruction for'enabling the effect of the self acting gear to be eliminated at will, and Fig 5 is an end elevation of the same.

Similar reference numerals denote eorresponding parts throughout the drawings.

7 represents the hammer-tup, which reciprocates vertically in guides as at 8 provided on the frame 9; 10bein' the anvil. The tup 7 is connecte'dby the p ston rod 11 to a piston which reciprocates within the steam cylinder 12, to the opposite ends of which steam is distributed by means of the working valve 13 (shown in F ig.-1 as beingv of the piston type) whereby the ports '14, 15 can be alternately put in communication 3 only the outer casings 13 and 17*" of these valves are shown. The stop-valve 17 (which may be a slide-valve as shown in Fig. 1){is controlled directly by hand in the usual manner, the valve-spind e 20 bein for this purpose coupled, through the me ium of a link 21, to a point 22--near the fulcrum 23 of a hand lever 24. The fulcrum 23 is a fixed horizontal axis upon which the handing lever 25, for controlling the working valve 13, is mounted to work alongside of the lever 24 as usual, and connections between the valve 13 and the lever 25 and hammer-tup 7 respectively being as follows.

To the tup 7 is pivoted at 26 the driving lever /27, which extends transversely with reference to the path of the tup, and has a" slidin connection withthe uide sleeve 28 where y the free end of the lever 27 is supported; the guide sleeve 28 which is pivoted to rock about a stationary fulcrum 29, constituting in effect a portlon of the driving lever 27. p y

To the spindle 30. of the working valve :13 is pivoted an intermediate point 31 in the length of a floating lever 32, whereofjone end 33 is coupled by'a connecting rod or link 34 to a point'35 in the guide sleeve 28near to the fulcrum 29 of the latterand between said fulcrum and-the point 26; the opposite end by the usual means) in the angular position corresponding to the length of stroke required in the hammer-tup 7, and the stop valve 17 is then opened by means of the handlever 24 to an extent corresponding to' the force of blow'requ-ired; Thetup 7 will there-- upon be automatically reciprocated in consequence of'steam beingadniitted to the opposite ends of the cylinder 12 alternately, as

the result ofthe movement imparted to the working valve 13-by the tup throughthe -mediumof the sleeve 28, link 34 and floating lever 32, which latter will for the time 1 being be rocked about'the poi-nt36- as a stationary fulcrum. The length of stroke, as well as the violence of the blow delivered by the tup, can be modified as usual by shifting the levers-'25 and 24 respectively.

' 'When the hammer is required to .work

non-automatically, z. e. to strike separate blows each under the direct control of the operator,.the stop valve 17 is opened by means of the lever 24 to an extent correspondin to the force of blow required, and the hen ing-lever 25 is moved to and fro through an arc corresponding to the length of stroke required in the tup 7 which will thereupon be reciprocated in accordance with such movement of the lever 25; this result being consequent on the combined movement imparted to the working valve 13 by the tup 7 and lever 25 through the rods 34 and 37 which concurrently but independently control the floating lever 32 from 0pposite ends and (it may be) opposite directions.

It will be observed that whi e the hammer is working automatically the length of stroke'of the/tup can' be v ried' at will by correspondingly altering the/position of the handing lever 25, precisely as is the-ease when the hammer is working non-automatically, sothatv (apart from intensity of steam pressure, which is regulated by means of the lever 24) all the operations of the hammer, whether automatic or non-automatic,-are equally and entirely under the control ofthe same handin lever 25.

If it be required to ma e provision for very rapid non-automatic working, the disturbin influence exercised upon the working'va ve. 13 by the tup 7 during the movements of'the latter, may be entirely eliminated by then causing the fulcrum 29 of the-j guide "sleeve 28 to coincide axially with the points 35 at which the link 34 is pivotally connected to the sleeve 28. Such an arrangement'is illustrated in Fig. 3 and in detailin to rock about a fixedfulcrum 40, the other arm 41 of this lever having a handle 42 whereby it maybe shifted as required between the proper limits determined by stops 43 43 at the ends of; a quadrant 44. The studs 29 engage in slots'45 provided in a pair of lateral wings 46 integral with the guide sleeve, the wings extending at opposite sides of the lug 47 which. carries the pivot pin forming the connection between the sleeve 28 and rod 34, and the slots 45 being of such length as to permit of the studs 29 being shifted from the normal position shown in Fi 5 to a position wherein they are in axial coincidence with the pivot pin 35.

In order to insure that the movement of the lever 39, 41 shall actually alter the position of the fulcrumstuds 29 relatively to the sleeve 28, and shall not merely cause the latter to swing with the link 34 about the point of suspension 33 thereof, the link 34 is fitted to. slide longitudinally through a fixed guide 48.

It will be obvious that when the fulcrum studs 29 are brought into axial coincidence with the pivot pin 35, the sleeve 28 will rock idly about this axis without transmitting movement through the link 34 to the working valve 13 which consequently, will be controlled solely by movement transmitted to it from the handing lever 25 through the link 37.

oscillating about a stationary fulcrum with the movements of the tap, a slidable valve Claims.

1. In a fluid-pressure hammer of the combined self acting and manually controlled type, the combination with a so-called drivmg lever pivoted by one of its ends to. the hammer-tup, a support for the other end of said lever'adapted to permit of the latter for distributing motive fluid to the respective ends of the working cylinder, and a handing lever for controlling said valve manually, of a floating lever pivoted to the slide valve spindle, and connecting rods coupling the driving and handing levers respectively to two points in the length of the floating lever separate from one another and from the connection of said lever with the slide valve spindle, substantially as and for the purpose set forth.

2. In a fluid-pressure hammer of the combined self acting and manually controlled type, the combination with a so-called driving lever pivoted to the hammer-tap, a slide valve for distributing motive fluid to the respective ends of the working cylinder, and

a handing lever for controlling said valve manually, of a floating lever pivoted at an intermediate point of its length to the slide valve spindle, a guide sleeve fulcrumed at a stationary point so as to constitute a combined telescopic and swinging support for the driving lever, and connecting rods coupling the opposite ends of the floating lever to the guide sleeve and handing lever respectively, substantially as and for the purpose specified.

3. In a fluid-pressure hammer of the combined self acting and manually controlledtype, the combination with a so-called drivin lever pivoted to the hammer-tap, a slide va ve for distributing motive fluid to the respective ends of the working cylinder, a handing lever for controlling said valve "manually, a floating'lever pivoted at an intermediate oint of its length to the slide valve spind e, a guide sleeve for the driving lever fulcrumed at a stationary point, and connecting rods coupling the opposite ends of the floating lever to the guide sleeve and handing lever respectively, of means for causing at will the fulcrum of the guide sleeve to coincide axially with the pivotal connection between said sleeve and the connecting rod whereby it is coupled to the floating lever, substantially as and for the purpose set forth. I

4. In a fluid-pressure hammer of the com bined self-acting and manually -'controlled type, the combination with a so-called drivin lever pivoted'to the hammer-tap, a slideva ve for distributing motive fluid to the re-. spectiveends of the working cylinder, a handin lever for controlling said valve manual y, a floating lever pivoted at an in-v termediate oint of its length to the slide valve spind e, a guide sleeve for the driving lever fulcrumed at a stationary point, and connecting rods coupling the opposite ends of the floating lever to the guide sleeve and handing lever respectively, of a air of slotted lateral wings on the guide s eeve, a pair of fulcrum studs in axial alinement with one another and engaging the slots of the respective lateral wings, a air of radius arms carrying the respective ulcrum studs and together capable of angular movement as one about a common axis, means for shifting said arms at will so as to transfer the fulcrum studs from normal position to one wherein they coincide axially with the pivotal connection between the guide sleeve and the connecting rod coupledthereto and vice versa, and a guide for said connecting rod, substantially as and for the purpose specified.

THOMAS EDMUND HOLMES. Witnesses: LUTHER J. PARR,

CHAs. N. DANIELS. 

